Shore



A. H. SYMONS Jan. 3o, 1945.

SHORE Filed June 16, 1943 @www Patented Jan.l 30, 1945 y SHORE f Animal.symons, Lchicago, 111., assiginorV te syk.mons Clamp & Mfg. Company,.ChicagQ, m1 .-a.

cannoli-ationlofllelaware l Application 'June 16, 194:3,""7Se1ial)No4905993' =6 claims. eisers-354) The Apresent inventionrelates generallyto shores. `More particularly lthe 'invention relates 'to that'typeofshorewhichis primarily adaptedV for use in connection with 'buildingconstruction and the 'like and comprises r"(1) a lower vstrut which isadapted Ito 'rest vupon a foundation or other fixed structures; (2) anupper strut which consists of a Vpair o'f .laterally spaced, parallel,vjupstanding timbers, is slidably connected tothe lower strutfan-dembodies at the lower end therelof 'means hfor releasably locking 'it inthe various positions intowhich it is slid or vertically ad- "iusted Vand at its upper end a metallic fnead bracket having a Jflattop wall;.and (3) i a removable yextension 'strut-which vis adapted vto `rest on'the top wall of 'thehead bracket and `serves asa medium lfor increasingthe over-all 'length -ol the upper strut in instances where anexceptionally long shore is required.

@ne object of the invention is to provide an 'extensible shore of thistype which ,is ,an improvement upon, and `-has certain inherent 4ad-`vantages over, previously designed shores and'is lcharacterized bythefact that/ it includes a `novel readily detachable connection forYmaintaining the extension strut in fits operative position wherein itrests upon the top Wall of the head bracket and is in longitudinalalignment with the upper 4and lower struts. j

Another obiect -of the invention is 'to provide ashore ofthe @lastmentioned character in which thereadifly detachable` connection betweenthe extension (strut and the upper endfof the upper strut comprises arodjwhich is secured to, `and depends from, "the 'lower end of thevextension strut and is adapted when the extension strut is in its"opera-tive `position tohave the lower end thereof extendthrough 4acentral hole in 4'the top -wall Aof` th head bracket land Vfit betweenthe upper ends of the two laterally spaced timbers 'constituting theupper strut, -andin addition comtprises =a crosspiece which 'extends'between `the two timbers `at arpoint beneath =the head bracket and hasa hole 'therein for receiving the lower extremity of 'the rod.

Another object vof 'the invention `'fis fto `provide a :shore 4of `the.type -an-'d rcharacter under -con- 'sideration in .which thezextensionstrut is .in the for-rn of a itimberhas .a longitudinal 'socket ir thelower end thereof iin-to which fthe .upper end of the frod Vis driven.and :embodies a "metallic *bottom plate which =is 'adapted to :rest4flatly 4'on the top-wall -of Athe head bracketxwhen `the eX'-tensionstrut isfin its normal tir-operative `.posi- -tion and iis'provided at'opposte margins thereofy with upstanding anges which lapthe,adjacent portions 'of `the lower end ofthe extension strut, .arecross 'connected Eby lbolts y'extendingv through the "lower end "ofthe,'extension ystrut#and flare adapted upon tightening -oftheboltseto-compress the .lower end of the 4extension lstrutso asposi-'tively yor firmly to lock the upper end of the rod inthe socket. l

A further `-object -of the invention is ft'ofprolvide 'a shore ofthejaforementionedcharacter'in which the crosspiece between the upperends Lof lthe `timbers constituting -the upperistrnt has clamping "means'in the Fior-m of ia -set screw Ifor holding the-lower lend of therod in*'xed =re`la' -tion with'th'e crosspiece when the extension strut 'is in"its Aoperative "position," and is `so Adesigned,

so fares the hole ltherein fis yno rrcerneizl;*that it lis 'adaptedYwhen the fextensi'onlstrutis" not in "use, `to receive and laterallyf`support vthe :upper l 'ends :of 'the lower strut -upon ffullrcollapsing or Afdowniivard s'hift'of the upper strut with respect tothelower'strut.

A l'still further object of the invention iis' to provide anextensible'fsho're [which is generally of new' vand A'in iprovedlconstruction and is -.no't only durable l'but also capable `of beingmanu-A -faeturedjat'a-lowor reasonablecost.l l

` Other 'o'bfj ects 'of the inventiouand the lvarious lmiva-ntages andcharacteristics -o'f ithe present shore will be `apparent 'from aconsideration of 'the'follo-wing detailed description.

I'lhe invention consists 2in v'the iseveral novel features -whicharefhereinater set forth r`and are ore particularly :de- *ed by claimslat the conclusion `hereof. f

In the drawing which accompanies land forms apart "of :this`Vspeciiic-ation or disclosure and-lin which "like -nurnerals'oifreferen'ce denote corresponding parts throughout *the several views:Figure vl fis a perspective-fof `an eXtensible 'shore vembodying theinvention; l y Figure 2 Ais a ver-ticalor vlongitudinal section showingthe extension -strut'f'in connectedor attached relation with the upperend et Ivthe'upper `f liigure 4 is a transverse section taken on'theline 4-4 of Figure 2 and showing the manner in which the crosspiecebetween the upper ends of the timbers constituting the upper strutserves to receive and hold in place the lower end of the rod when theextension strut is in its normal position;

Figure is a vertical section of the upper end of the upper strut,showing the manner in which the crosspiece receives and serves laterallyto support the upper end of the lower strut when the extension strut isnot in use and the upper strut is lowered to substantially its fullestextent with respect to the lower strut; and y Figure 6 is a transversesection on the line 6 6 of Figure 5.

The shore which is shown in the d-rawing constitutes the preferred formor embodiment of the invention. It is primarily designed or adapted foruse in connection with building construction and the like and as itsmain or principal parts comprises a lower strut 1, an upper strut 8 andan extension strut 9. As hereinafter pointed out, the extension strut isadapted to be used when it is desired t increase the over-all length ofthe upper strut 8 in instances where an exceptionally long shore isrequired.

The lower strut 'I is in the form of a metallic structural element ofT-shaped cross section and comprises a web I and a coextensive flangeII. As shown in'Figures l, 5.and 6, the flange is formed integrally withone margin of the web I0 and projects outwards in opposite directionstherefrom. The lower end of the strut I is provided with a shoe I2 andthis is adapted to rest on a foundation or other structure (not shown).When the shore is in its operation position the lower strut 'I extendsvertically.

The upper strut 8 is longitudinally aligned with, and is verticallyadjustable relatively to, the lower strut 'I. It consists of a pair oflaterally spaced, parallel, upstanding timbers I3 and embodies a bottombracket I4 and a head bracket I5 at its upper end. These two bracketsserve to hold the timbers I3 in laterally spaced relation. The bottombracket I4 is of U-shaped cross section and embodies a centrallypositioned, depending exten` sion I6. The latter has a verticallyextending open ended channel ofT-shaped cross section in which the lowerstrut I ts slidably. The timbers I3y of the upper strut 8 are spacedapart so that they are in straddled relation with the lower strut I andreceive the upper end of the lower strut therebetween. The extension I6serves as a slide type bearing for permitting the upper strut to slidevertically relatively to the lower strut. A plate I'I surrounds theupper end of the lower strut 'I and is pivotally supported between thelower ends of the timbers 8 so that it is free to tilt vertically to alimited extent. This plate is adapted so to' coact with a lever (notshown) as to effect raising of thev upper strut 8 with-respect to thelower strut. A clutch plate I8 surrounds the upper end of the lowerstrut I at a point beneath the plate I'I and is pivotally connected tothe lower ends of the timbers I3 so that it -is free to tilt to alimited extent. This clutch plate serves automatically to hold the upperstrut in the various positions into which it is raised and is adaptedwhen tilted downwards by way of the aforementioned lever to vrelease`the upper strut so that it slides downwards. The plate I'I and theclutch plate I8 form no part ofthe present invention and constitute thesubject matter of an application for United States Letters Patent led byme on July 26, 1943, Serial No. 496,127. A wedge I9 is slidably mountedin a transverse slot or channel 20 in the extension I6 and coacts with alongitudinal series of slots 2l in the web l0 of the lower strutadditionally to lock the upper strut in its various adjusted positionswith respect to the lower strut. The head bracket I5 is in theforrn of aone-piece metal casting and comprises a pair of spaced apart, parallel,opposed side walls 22, a pair of spaced apart, parallel, opposed endwalls 23, and a flat rectangular top wall 24. The end walls 23 extendbetween, and are connected to, the ends of the side walls 22 and definewith -the side walls and the top wall 24 a downwardly facing socket 25for the upper ends of the timbers |3. The top wall 24 forms a ilatbearing surface for the extension strut 9 and is adaptedrwhen theextension strut is not in use to support an L head or T headtype ofcrossbar (not shown). Bolts 25 extend through aligned holes in the endwalls 23 and the upper ends of the timbers I3 and serve flxedly tosecure the head bracket I5 in .place and also to hold the upper ends ofthe timbers I3 in xed spaced relation. The central portion of the topwall 24 is provided with a circular hole 2 and this ispositionedcentrally with respect to, and communicates with, the spacebetween the timbers I3 constituting the upper strut 8.

The extension strut 9 is adapted `when in use to rest on the top wall 24of the head bracket I5 and serves as an extension of the upper strut 8,It is in the form of a timber of rectangular cross section and isprovided at its lower end with a depending -longitudinally extending rod23. The latter serves detachably or releasably to hold the extensionstrut 9 in its normal or operative position and has the upper endthereof driven into a bore formed socket 29 in the lower end of thetimber constituting the extension strut 9. The l-ower end of the rod 28is adapted to extend through the hole 21 of the top wall'24 of the headbracket I5 and rit between the upper ends of the timbers I3, as kshownin Figure 2. In assembling the extension strut 9 with respect to theupper strut 8 the extension strut is positioned above the upper strutand is then manipulated so as to bring the rod 28 into alignment withthe hole 27. Thereafterit is lowered so as to cause the lower exposedend of the rod to slide through the hole Z'I and enter the space betweenthe upper ends of said timbers I3. In order to hold the lower end of therod 28 against lateral displacement when the extension strut 9 is in itsoperative or norlmal position a crosspiece 30 is provided. Thiscrosspiece is preferably in the form of a metal casting and extendsbetween the upper ends of the timbers I3 at a point beneath the headbracket I5. It comprises a top wall3I and a depending U-shaped flange.The latter consists of a side piece 32 and a pair-.of end pieces 33. Theend pieces 33 of the flange twithin transverse grooves 34 in the innerfaces of the timbers i3 and are secured in place by way of bolts 35. Thelatter, as best shown in Figure 5, extend through aligned holes in theend pieces 33 and the adjacent portions of the timbers I3. The top wall3I is provided with a hole 36 which is shaped snugly to receive thelower end of the rod 28 when the extension strut 9 is in its operativeposition. The

`crosspiece 30 operates in effect as a bearing for the lower end of therod and holds the latter against lateral displacement. The hole 35 isver.

tically aligned with the hole 21 in the top wall 24 of the head bracketI5. In order tok hold the extension strut 9 in connected relation withthe up- 'aranceles l"151er strut and prevent it from@burnin-g about the"axis o'f the Tod 129 na 4set-"screw-31y *is provided.

`This set screw extends throu'gih@ a transverse ocrew thread lequipped'hole 38 in the `side piece 32 of the U-s'ha-ped 'flange that '-iorms-aparteci Ithe f 'crosspi'ece 30. fWhenitheeXtensicn strut@ is gin' 'itsoperative vposition. wherein ftheilower -end of 'the 1rod 2'8fextendsthrough the holes-f2?! and-36 in clamped or locked `relation with the:crosspiece rigidly or 4vfliredly 'connecte`d to the upper Istrut i8Yand fheld "against rotation relatively thereto v"'-Ihe eet screw `A31iis-so positioned that ith'e kinner @end thereof `faces in the`direction off-theholeV 36. 'When it `is desired to 'release the rodt298 4'C011- nection with removal of the extension strut 9 the `setscrew-f3?! Tis loosened.' The 'head-'bracket I5,

theirod 2'8 fand ilifecrosspiece 530 1constl-tute1a\read'ilyfdetaohadcleconnection between 'fthe -upperend of tl'reupper-strut-Band thelowerend ofthe extension 'strut l9.' shown Ein lliguresflland-'ii the 'hole @36 "in the :top -walll 3|- ofthe icrJosspiece 30-isflsorshaped that it mot only serves-"snugly te receive 'the lowerfend ofithe 'rod 258 when ,the extension s'trut'iS is iin iits operativeposition; butalso'ito-fre- 'ce'iva and form fa :bearing for, the 'upperend of the lower strut 1 when-the extension Strut is `not linuseland'theyupper strut Sie collapsedorshi'fted downwards yIto/a point wherethe-upper-ends of the timbers Irs .stradale lthe opper end of ftheAlower ystrut 11. v I

VInsadditionI Ito the 'rod 128 '2t-he extension Istrut 4'9 :embodies 'a:metal-lic rectangular lbo'ttoznplate yThis plate nts lflatly 4againstthe `Abottom face #of Athe extension strut and iis provided at :oppositemargins thereof withzupstandingrflanges 4D. f`The =latter lap theadjacent yportions of the lower yend fof the "extension strut 9, asshown in'liigures 2 and 3, :andare-cross -connectedby wayiof apair ofboltsl I. The 'latter 'are arranged in Lstraddled reliatjtion `with`4`the upper socket enclosed-end of ithe `rod E29 and extend throughaligned holes in the flanges 40 and the lower end of the extensionstrut. When ithe'lafoltsare tightened to their fullest extent the anges40 are urged inwards and serve so as to compress or contract the lowerend of the extension strut as positively or firmly to lock the upper endof the rod 28 in the socket 29. The plate 39 is adapted to rest flatlyon the top wall of the head bracket I5 when the extension strut 9 is inits operative position and hasA a central hole 42 for accommodating the`rod 28.

The latter is preferably in the form of a pipe. The metallic bottomplate/ 39 with its opposed .upstandinganges 40 serves not onlytocompress the lower end of the extension strut around the.

upper endof the rod 28.but also to prevent splintering of the lowerendof the extension strut and forms a flat bottom bearing surface forengaging flatly the top wall 24 of the head bracket I5.

When itis desired to use the extension strut 9 in connection with useofthe shore the set screw 31 is loosened. Thereafter the extension strutis positioned over the upper end of the upper strut 8 and manipulated soas to bring the lower or exposed end of the rod 28 into alignment withthe hole 21 in the top Wall of the head bracket l5. After the extensionstrut is `so positioned itis -loweredso as to cause-the lower end of therod 28 to slide through the hole 21 and also through y the hole 36 inthe top wall 33 of the crosspiecev When the extension strut is loweredto itsl 38. fullest extent the metallic plate 39 abuts `atly place theLset zscrewy `is tightened I:so as to .look the Todl 'against rotativeas Welles faxialdisplacef `nient.` V"Tighteningofthe set screwAresults-lin 'the 'extenson'strrtbeing fixedl-y secured in opennati-veposition.`

l therein .in alignment 'with the hole inthe "top4 sonakilecost.

Tnet-herein described shore enectiveiy andrem- Pcieritl'y fuliills `Aitsintended-'purpose and is fcharla'c-terizedfilo-y the fact that vtheextension l'strut 9 may f'be quickly Aand *readily attached lfto, andder'taliilrerl Ifrom, the upper stru-t' l8. 'lt is also ycharaoterizedbythe fact that rit is :durable land -capable lof .being manufactured ata A'low and rea- The .invention is trotto be understood as re` 'strictedtothe idetails set-forth rsince these may be modified 'within`thescopeof the Iappended without Adeparting lfrom fthe spirit and`fscopefoffitlreinvention.v

1Having thus ytlescri'bed the yinvention what :I claim` as `new--andrdesi-re to secure by Letters "1. -A shore' comprising. `an upstandingflower "strut, an upper strut-embodying va pair of -e'lon-v gatedup'standirrglaterally-spaced members 'in 'stradd'led relation"with 4thelower lstrut, adapted to slide vertically lrelatively Avto "said lowerstrut, and having a head bracket 'connected to the vur per :endsof themembers 'and-provided* with 'a flat tvp 'Weill 'with Ia hole lin theAcentral iportion `thereof 'communicatingwith the yspace between vsaid lupper ends ofthe members, andalso 'having a crosspiece extending lacrosszsaid Tspace 'at 'a point beneath r,the 'head bracket .and "havinga hole wa'll, a 'removable selectively usable timber ,type extensionstrut adapted when vin usefto 4restflatly on the top wall 'o'f the headlbracket and form a longitudinal continuation oi 'the main strut andhaving a hat bottom 'surface with a'centrall'y disposed socketleadingupwards therefrom, a rod -having; one end thereof extending into., andfixed within, lthe .socket and .its other-end .adapted 'to l extendthrough the two aforementionedholes and hold said extension strutagainst lateral displacement with respect to said upper strut, andreleasable means associated with said crosspiece for locking said otherend of the rod to said crosspiece when it is in its extension strutholding position. 1 y l 2. A shore comprising a. main upstanding struthaving a flat horizontal bearing surface `at its upper end and a socketleading downwards from said surface, a selectively usable'timbertypeextension strut adapted when in use to assume an operative position`wherein it rests on the bearing surface and forms a longitudinalcontinuation of l the main strut,` and having a'flat bottom surface witha bore leading upwards therefrom, and a rodhaving one end thereof fixedwithin the bore and its other end adapted to extend into. the. socketand hold said extension strut against lateral displacement with respectto the main strut when it is in yits operative position.

' 3. A shore comprising a. main upstanding strut having a at horizontalbearing surface at its upper end and a' socket leading downwards from,said surface, aselectively usable timber type extension strut adaptedwhen in use to assume an operativevposition wherein it rests on thebearing surface and forms a longitudinal continua-1 tion of themainstrut, and having a flat bottom surface with a bore leading upwardstherefrom, al rod having one end thereof driven into the bore Y and itsother endadapted'to extendA into the socketand hold said vextensionstrut against lateral displacement with respect to the main strut whenit is in its said operativeposition, and means ,for compressing thelowerend of the extension strut around said one end of the rod.

4. A shore comprising a main upstandingstrut havings a at horizontalbearing surface at its upper'end and a socket leading downwards fromsaid surface, a selectively usable timber type extension strut adaptedwhen in use to assume an operative position `wherein it rests on thebear ing surface and forms a longitudinal continuation of the mainstrut, and having a flat bottom surface with a bore leading upwardstherefrom, a rod having one end thereof driven into the bore and itsother endv adapted to extend into the 'socket and hold said extensionstrut against lateral displacement with respect to the main strut whenit is in its said operative position, a-metallic plate fitting againstsaid bottom face of the extension strut and having a hole therein inregistry with the bore for accommodatingrsaid one end of the rod and inaddition a pair of opposed ends of the members and provided with a flattop wall with a hole in the central portion thereof communicating withthe space between said upper endsof the members, a selectively usabletimber type extension strut adapted when in .use to assume an operativeposition wherein it rests on the top wall of the head bracket and formsa longitudinal continuation of the main strut, and having a flat bottomsurface with a centrally disposed bore formed socket leading upwardstherefrom, a rod having one end thereof driven into the socket and itsother end adapted to extend through the hole into said space and holdsaid extension strut against lateral displacement with respect to themain strut when it is in its operative position, a metallic platefitting against the bottom surface of the extension strut and having ahole therein in registry with the .socket for accommodating said one endof the rod and in addition a pair of opposed upstanding marginalyflanges arranged in lappedI relation with the adjacent portions of theextension strut, and a pair of bolts extending through the flanges andthe lower end of the extension strut and arranged in straddled relationwith the rod and adapted when tightened to urge the flanges inwards intoa position wherein they compress said lower end of the strut around saidone end of the rod.

6, A shore comprising an upstanding =lower strut, an upper strutembodying a pair of elongated upstanding laterally spaced members instraddled relation with the lower strut, adapted to slideverticallyrelatively to the lower strut,

and having a head bracket connected to the upper ends of the members andprovided with a flat top wall having a hole in the central portion4thereof communicating with the space between -said upper ends of themembers, a selectively usable extension strut adapted when in use torest on the top wall of the head bracket and form a longitudinalcontinuation of the upper strut and having a depending rod adapted toextend through the hole into said space and hold said' extension strutagainst lateral 'displacement with respect to the upper strut,` and acrosspiece extending across said space at a point `beneath the headbracket and having a hole `therein adapted when the upper strut is yin araised position with respect to the lower strut and the extension strutis in use to receive the lower end of the rod and further adapted whenlthe extension strut is not in use and the upper strut is lowered withrespect to the lower strut to receive and guide the upper end of saidlower strut. Y ARTHUR H. SYMONS.

